Question

我使用itext sharp来动态创建PDF。我正在使用ColumnText，因为我正在处理从右到左的内容。通过搜索网络，我理解column.SetSimpleColumn接受4个args（x，y，w，h）对吗？我的第一个问题是我不知道列的宽度和高度，我需要它是文本内容的动态。任何人都知道如何根据他的内容设置列宽和高度？

try
        {
            for (int j = 0; j < project.Slides[i].Labels.Count; j++)
            {
                string pageContext = project.Slides[i].Labels[j].Text;
                int fontNumber = Convert.ToInt32(project.Slides[i].Labels[j].Font);
                int fontSize = Convert.ToInt32(project.Slides[i].Labels[j].Size);
                float fontSizePoints = (float)fontSize * (float)2.3;
                string fontColor = project.Slides[i].Labels[j].Color;
                float fontX = (float)project.Slides[i].Labels[j].X;
                float fontY = (float)project.Slides[i].Labels[j].Y;
                var color = System.Drawing.ColorTranslator.FromHtml(fontColor);

                baseFont = GetBaseFont(fontNumber);

                float w = baseFont.GetWidthPoint(pageContext, fontSizePoints);
                Font dFont = new Font(baseFont, fontSizePoints);


                dFont.Color = new BaseColor(color);
                ColumnText column = new ColumnText(writer.DirectContent);
                column.SetSimpleColumn(fontX, fontY, w, 100);

                column.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
                column.AddElement(new Paragraph(pageContext, dFont));

                column.Go();
            }
        }
        catch (Exception)
        {

        }

我附上图片来描述问题。文档中可以有一个或20个文本列。我不知道字体的大小和这个文本有多长。它可以是2个单词或30个单词。我唯一的信息是左边的x，y底部坐标（以及字体系列，大小，颜色......）我的问题是如何创建TextColumn（由于RTL支持需要使用它）并将其放置在特定的coords位置。

Answer 1

@mkl感谢您的回复。我找到的最佳解决方案是。在绝对位置+ RTL支持下工作得很好。

try
        {
            for (int j = 0; j < project.Slides[i].Labels.Count; j++)
            {
                string pageContext = project.Slides[i].Labels[j].Text;
                int fontNumber = Convert.ToInt32(project.Slides[i].Labels[j].Font);
                int fontSize = Convert.ToInt32(project.Slides[i].Labels[j].Size);
                float fontSizePoints = (float)fontSize * (float)2.1;
                string fontColor = project.Slides[i].Labels[j].Color;

                float X = (float)project.Slides[i].Labels[j].X;
                float Y = pHeightPoints - (float)project.Slides[i].Labels[j].Y;
                float width = (float)project.Slides[i].Labels[j].Widht;
                float height = (float)project.Slides[i].Labels[j].Heigh;

                float llx = X;
                float lly = Y + height;
                float urx = X + width;
                float ury = Y;

                var color = System.Drawing.ColorTranslator.FromHtml(fontColor);

                baseFont = GetBaseFont(fontNumber);
                float w = baseFont.GetWidthPoint(pageContext, fontSizePoints);
                Font dFont = new Font(baseFont, fontSizePoints);
                dFont.Color = new BaseColor(color);

                PlaceText(writer.DirectContent, pageContext, 
                    new Font(baseFont, fontSizePoints, 
                        Font.NORMAL,
                        new BaseColor(color)), llx, lly, urx, ury, 14, 
                        Element.ALIGN_RIGHT);
            }
        }
        catch (Exception)
        {

        }

和...

protected static void PlaceText(PdfContentByte pdfContentByte
                            , string text
                            , iTextSharp.text.Font font
                            , float lowerLeftx
                            , float lowerLefty
                            , float upperRightx
                            , float upperRighty
                            , float leading
                            , int alignment)
{
    ColumnText ct = new ColumnText(pdfContentByte);
    ct.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
    ct.SetSimpleColumn(new Phrase(text, font), lowerLeftx, lowerLefty, upperRightx, upperRighty, leading, alignment);
    ct.Go();
}

由于

将列文本放在绝对点itext sharp中

1 个答案: